Let the point 6.37 is marked as A and 6.38 is marked as B
Length AB=6.38−6.37=.01
Number of units between A and B =10
Length of each unit =.0110=.001
Given point is 8 units forward from 6.37
So, the location of given point =6.37+.001×8=6.378.
Hence, option B is correct.