Okay, here is the problem I'm stuck on

The heights of women aged 20 to 29 follow approximately the N(64, 2.7) distribution. Men the same age have heights distributed as N(69.3,2.8). What percent of young men are shorter than the mean height of young women?

I have been trying to figure out where to even begin and I have no clue! If someone can show me how to solve this that would be great!!