Seven times the length of their tail, huh? *goes to annoy the cat to measure her tail* Zissou should be able to jump seven feet it the air... her tail is actually a foot long from the base of her tail on her back to the tip, eleven inches if we're only counting bone, if so then about 6 and a half. She can't do that.
As for running and jumping, it'll be farther but lower. They have those spring-loaded hips like most four-legged aminals that requires a really weird stance, if you watch a cat about to jump they sort of sit back on their haunches. They could never do that and run at the same time.