Had a non displaced fractured fibula about 4 to 6 inches above the right ankle... Is surgery necessary?

Maybe. Is truely nondisplaced then no surgery necessary. If it is have then surgery. Even 2 mm of displacement can lead to prolonged healing up to 16 weeks.
Non displaced fractu. If it is perfect alignment then casting would be enough. Most often surgery would be for displaced fracture. The fibula is a non weight bearing bone so should heal fine in cast and crutches.