1. If you have a Saved Game from before getting the quest, load it and try to get Tolfdir to use a different location.
2. If you use an XBOX, look in the Technical Support Forum for XBOX and see if a PC user is willing and able to "fix" Your current Saved Game.
3. If you are an a PS3 and do nat have an earlier Saved Game, I have no idea if there is a way of saluaging your character.