Logo positioning

[Bryguth3]

I currently installed a Wordpress template for a cousin and am having issues with overlaying his logo across the navigation. The problem can be seen here:
http://magicbyphil.com/

Basically I would like the logo to be offset from the right and hanging over the cave bar. Because I have to have a axis am I correct that it has to be an absolute setting? I would like to anchor to the banner image so that when te page resizes it moves with it. The current css is here:

background: url(images/header-bg.png) center top no-repeat;
}

.logo {
  position:absolute;
left:110px;
top:100px;
    z-index:1000;
}

Any and all help is greatly appreciated!