How to put new store in place of old store

[harborsales]

We have just built a new store on our server, (subdomain) of current site and want to replace the old store with the newly built store, how do I go about doing this? I want it to be example www.mystore.net currently it is www.mystore.net/cre

 

I understand that I have to have direct server access or I can just redirect it to the new store but this will affect my search engine rankings.

 

So if anyone know how I can do this I would appreciate any help or advice.

 

Thank you

 

Mike