Look up in table. The weight of a score in an average depends on the variability. The greater the s, the greater weight a score will have if you don't use z's. The second score above is weighted twice as much as the others. There are some disadvantages to z scores of course.
Advantage is they can be manipulated arithmetically.
So they are cumbersome. The reason we spend so much time on z scores, is that I think they are the best way to understand the normal curve. Click here to return to the top of the page.