SOLUTION: P(z>-1) IM CONFUSED MY TEACHER GOT .8431 AND I GOT .8417 CAN YOU SHOW ME HOW TO SOLVE THIS

Question 1099816: P(z>-1) IM CONFUSED MY TEACHER GOT .8431 AND I GOT .8417 CAN YOU SHOW ME HOW TO SOLVE THIS
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
I used EXCEL's NORMSDIST function for .

So,

.
.
.
What method are each of you using?
Perhaps there is some roundoff error to each but I'm surprised you only have two decimal place agreement.