i cannot seem to grasp this. the information is: scores for an employee eligibility exam are normally distributed with a mean of 80 and a standard...

i cannot seem to grasp this. the information is: scores for an employee eligibility exam are normally distributed with a mean of 80 and a standard deviation of 6.7. To be eligible for employment, you must score the top 7 percent. A) what is the lowest score you can get and still be eligible for employment? B) what percent of the exam-takers scored between 76 and 86 on the exam? C) find the x-score interval that contains the middle 66 percent of the distribution's area. can you please show the work i am lost. thank you