Find "a" and "z" for P(z>a) = 0.6789

[chucha]

I'm having some problem with this one:

P(z>a) = 0.6789

I'm supposed to find the value of "a", and then the z value so that 35% of the middle area is bounded by them.

 

[marcmtlca]

You should go see your teacher if you can't do this. Either that or reread the book.