Question 1197272
mean is 79.
standard deviation is 6.5
z = (x-m)/s
z is the z-score
x is the raw score
m is the mean
s is the standard deviation.
for this problem:
z = (85.5 - 79) / 6.5 = 1
probability of getting a z-score below 1 = area to the left of the z-score = .8413447404 = .84 rounded to 2 decimal places.
that's the same as probability of getting a raw score below 85.5.