Question

How do you find the area that is beyond a z-score?

Answer 1

did you mean something like
P(z > 2.1) ?
= 1 - P(z < 2.1)

remember that your normal distribution tables always give you the area for "less"

or you replace your tables with this applet:
http://davidmlane.com/normal.html

So using my example of P(z > 2.1)
I just click on the greater than , enter 2.1 and voila!!! , I get .0179

If you meant z-scores beyond the tables you are probably using,
look at the last entry, it should give you a prob of .99????,

e.g. for a z-score of 3.8, David Lane's applet gives you a prob of .9999