Statistics ?

P( z ≤ 0 ) = 0.5000

P( z ≤ -1.99 ) = 0.0233

P( -1.99 ≤ z ≤ 0 ) 

= 0.5000 - 0.0233

= 0.4767

—————

I don't know..............

The idea is to lookup in your z table. We can't go to your place and open your book

for you. [or use an online z table]. 

Or, try to recall the meaning of 1 std, 2 std etc.

Or, are you really asking to evaluate the integral?

Hopefully no one will spoil you the answer thereby depriving you from your personal enhancement; that would be very inconsiderate of them. Too late. :(