The amount of Jen's monthly phone bill is normally distributed with a mean of $60 and the standard deviation is $12. 60% of her phone bills are...

The amount of Jen's monthly phone bill is normally distributed with a mean of $60 and the standard deviation is $12. 60% of her phone bills are between $_____________ and $______________.

the answer I got was 68%of the phone bills are between $72 and $56 is this correct? If so how do I put it into excel