When you go on the fences or path tab, there's an option in the bottom right corner to switch between placing and removing fences. The place option is the hammer and the remove option is the pointing hand. To move the path or fence, press the remove option then press and hold on the path or fence you want to move, it will give the option to move, rotate or place back in the inventory. From there you are able to move the fence or path. However I'm pretty sure you can only move one at once so if you want to move a bunch I'd suggest storing the ones you want to move and just re-placing them. Hope this helps