Instructions
Visit the Battle.net website to access your Blizzard account. Battle.net is the website used to manage all Blizzard account information.
Press "Log In." Enter your email address and password. Click "Log In" again.
Click "Support" in the upper right-hand corner, then click "Ask a Question."
Enter a short note to a Battle.net administrator and ask them to change your secret question. Explain why you need the question changed and provide your contact information, such as your email address and phone number. Click "Submit." An administrator will review your account and contact you.