I dont get it pls help

Question

For a standard normal distribution, find:

P(z > c) = 0.3434

Find c rounded to two decimal places.

Answer 1

by the empirical rule

68% lie within 1 standard deviation from the mean

and 68/2 = 34% lie within 1 standard deviation above the mean

if P(z>c) = 0.34 that's oddly similar to P(z>1) = .5-.34 = .16

which seems irrelevant, but maybe there's a typo in the problem, aside of possibly .34 instead of .3434

but as is, use z tables or a z calculator and plug in .16 or .1566

meaning 0<c<1

use z tables or go on line to find where c is between 0 and 1, big WAG, big wild A guess about .5

which is, after a z caculator, = about 0.403, using .1566

rounded to 2 decimals

= 0.40