For a normal distribution with a mean of 7.5 and a variance of 9, find the following:

P(x greater than or equal to 8.5)

=1 - P(Z less than or equal to (8.5-7.5)/3)

=1 - P(1/3)

1/3 on the z-score table is 0.6293

=1 - 0.6293

=0.3708

Is that correct? If not, what am I doing wrong? All help appreciated!