find the minimum score required for an A grade. mean is 76.3 and standard deviation of 7.7

A philosophy professor assigns letter grades on a test according to the following scheme. A: Top 12 % of scores B: Scores below the top 12 % and above the bottom 57% C: Scores below the top 43% and above the bottom 18 % D: Scores below the top 82 % and above the bottom 8 % F: Bottom 8 % of scores Scores on the test are normally distributed with a mean of 76.3 and a standard deviation of 7.7. Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary