Please help if your able to (:

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

What is the answer to this equation? and if you can, find a way to show your work.

Shirley spelled 12 of her 15 spelling words correctly on the test. what percentage did shirley get on the test?