Akiko operates a private medical research facility in Japan. The clinic’s monthly telephone bill is normally distributed with a mean of $67.69 and a standard deviation of $3. Akiko is considering a calling plan that has a great benefit for a customer who often uses international calling and whose phone bill is more than $75 per month; however, the plan also requires an extra basic fee for the service. What is the probability that Akiko’s phone bill is going to be more than $75?

Please provide an answer on an excel spreadsheet and provide a formula explanation