About the sealing of your records as I have had it told to me air carriers now pull FBI records and they report everything right down to pooping in your pants in the third grade. due to the freedom of info act.
If you were a minor at the time I think you are OK but consult a lawyer. Every state has different laws but maybe this will help. This is MA law.
In Massachusetts, an application for employment with a sealed record on file with the commissioner of probation may answer "No Record" with respect to any inquiry herein relative to prior arrests, criminal court appearances or convictions. An applicant for employment with a sealed record on file with the commissioner of probation may answer "No Record" to an inquiry herein relative to prior arrests or criminal court appearances. In addition, any applicant for employment may answer "No Record" with respect to any inquiry relative to prior arrests, court appearances and adjudications in all cases of delinquency or as a child in need of services which did not result in a complaint transferred to the superior court for criminal prosecution.
It is against the law for MA to give out any information to the HR department for the company that is hiring you if you were a delinquent at the time. That is why you may answer no to that question. The feds do their own background check to determine if you have committed any of those crimes and then, if the answer is yes they notify the company.
Good Luck