Someone Hacked my yahoo account and change all of my Registraion
information including the Address, postal code and secret question.
The only information probably not changed should be my Date of Birth.
In this circustances how I can recover the password.

All you can try to do is contact Yahoo through this form

http://add.yahoo.com/fast/help/us/edit/cgi_feedback

You may probably contact Yahoo Customer Service, telling that someone
hacked your account and they changed all your vital registration
information. They can find out whether your mailbox was hacked by
checking the IP address, if you can send them yours,and ask them to
verify if it is being accessed by a totally different one recently.

But again to be frank, the decision lies on their interpretation and
how truthful you look to them. As according to the norms, you are not
to reveal your passwords/vital info to anyone.