Answer:
Bus drop him off 64 miles far from the school.
Explanation:
 Total distance traveled by Nigel from Home to school each day = 312 miles
 Distance from bus stop to his home = 14 miles
Distance traveled by Nigel on the city bus = 234 miles.
Distance from bus drop off position to school = X miles
We have Total distance traveled by Nigel = 14+234+X = 248+X
Equating both total distances
     248+X = 312
      X = 64 miles.
 So bus drop him off 64 miles far from the school.