When traveling w/6 months old to country that is 9 hours ahead will it cause my baby sleep all day(now he sleeps all night)and be awake through night?

It may take a few: days for your baby (and you) to adjust to the time difference. Depending on when you are leaving, you may be able to help that transition, but adjusting his sleep schedule a little bit at a time before you go. Otherwise you can keep him as awake as you can during the daytime once you're there and hopefully move the schedule to be more accommodating to the new time.