dual boot - Hard-Disk Partitioning: Please Help Me! :(

Guys i am new to linux and all that stuff. I installed ubuntu alongside windows 8.1 a few days ago and i am not happy with the hard disk partition so i installed gparted, i want to add the unallocated part to sda5. Is there anyway i can do it without shutting down my computer?
I was going to add a picture for more info but apparently my rep isn't high enough :) But here some info from gparted:

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• Partition ......... File System ....... Mount Point ........... Label ................... Size ............ Flags


• /dev/sda1 ........ ntfs .............................. * ............. System Reserved ..... 350.00 MiB ...... boot



• /dev/sda2 ........ ntfs ...............................* .......................... * ................... 81.93 GiB ............ *


• unallocated ..... unallocated ..................* .......................... * ................... 18.54 GiB ............ *


• /dev/sda3 ........ extended ......................* .......................... * ................... 18.42 GiB ............ *
  
  
  
  
  • /dev/sda5 ........ ext4 ....................... / .......................... * ................... 14.51 GiB ............ *
  
  
  • /dev/sda6 ........ linux-swap ............* .......................... * ..................... 3.91 GiB ............. *
  
  

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i used (*) for empty

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And if it's important there was a key symbol next to sda 3-5-6

1. Boot from Ubuntu LiveUSB. Choose "Try Ubuntu" and start gparted.





2. Run in terminal sudo swapoff -a




3. Resize sda3 partition left.




4. Resize sda5 partition left.




5. Run in terminal

   
   
   

   sudo mount /dev/sda5 /mnt
   sudo chroot /mnt
   sudo grub-install /dev/sda
   




6. Reboot.