stat
posted by janet .
Find the area under the standard normal curve to the left of z = 1.88, P(z < 1.88). (Give your answer correct to four decimal places.)

Just find 1.88 in your chart or in your table, which you surely must have.
If not, here is an online standard normal curve ....
http://davidmlane.com/hyperstat/z_table.html
click on "below" and enter 1.88
you should get .969946