Subject: In what dimension does gravity originate in?

Upon my basic understanding of gravity and the graviton, gravity is a force 
left over from another dimension that we feel the effects of (such as a fish 
in water has no concept of what's above the water, let alone rain hitting the 
water, but it feels the effects of the rain).  This is atleast what I've 
read/heard.  If this is true, then what dimension does gravity/graviton 
actually exist in (i.e. not just the effects of it left over)?  Would gravity 
exists in higher dimensions than the one in the answer to the previous 
question?

Re: In what dimension does gravity originate in?