I find it easier to just go back over what you have done.

Cylinder 5 is on the front, closest to the air box. I would just pull the plug wire and spark plug and inspect them. Then swap the plug with cylinder 3 and see if the misfire moves. If not, swap the plug wire, then swap the coil packs around and see what it does. Once you know it's not a spark issue, then look into swapping the injectors around.