How do I know if my Green acrd was approved or not?

I.O.s usually don't tell applicants that they are approved because every file is being checked by a superior of the I.O. That's just a formality. Let's put it this way: if you were not approved, you'd know, trust me. Your wife would be crying at home in light of the torture she had to go through. It's fair to assume that you've been approved. The Green Card arrives in the mail about 10 to 14 days from now.