Question 1157451
z=(x-mean)/sd
(97.7-92.12)/2.43=2.30

(87.2-92.12)/2.43=-2.02
(95.2-92.12)/2.43=1.27
probability of z between those two values is 0.876

above 95.2, that is z-score above 1.27 with probability 0.102

9th percentile is 88.9 mph