It's probably on a census, or immigration or naturalization paperwork if she came to the United States later on. Or marriage certificate, or if has since passed away, possibly on her death certificate, if somebody who knew her age, put it down. Other than that, I don't think you're going to have a very easy time finding that out, because from America, accessing genealogical records from places like Iraq are very sparse. And many government buildings there have been destroyed from wars, but also, since it's Iraq, they don't really make the records they do have easily accessible in digital form, especially by Americans. If you have any other living family from her generation, that you can talk to, that might personally know this information, then try reaching out to them.