Question 983636
z=(score-100)/15
70 to 115 is the probability of -2 is less than z which is less than 1, or 0.8186.  (0,8186 in Europe)
above 85 is z>-1 or 0.8413
Below 85 is the complement of the last or 0.1587 (0,1587 in Europe)
115 or more is the probability of z>1.  That is the same as the probability of z<-1, which we just figured.  It is also 0.1587.