An English professor assigns letter grades on a test according to the following scheme.

A: Top9% of scores

B: Scores below the top9%and above the bottom61%

C: Scores below the top39% and above the bottom25%

D: Scores below the top75% and above the bottom10%

F: Bottom10% of scores

Scores on the test are normally distributed with a mean of72.3 and a standard deviation of8. Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary.