About the 10x multiplier

Is a human get a 10x multiplier

That would make the average man able to bench around 2000lb and able to run 150mph as well as punch at 150mph. Assuming your skeletal system matches your strength and speed you'd kill the poor Gorilla before it knew what happened.

Hitting something with that much strength and speed would create 7527433 lbs. of kinetic energy. That's the point when a living thing would just splat on impact

If your cells regenerate at 10x the normal rate you'd be almost immortal and would never age.

-some guy in Quora

The average human can withstand an object traveling at 300fps without much harm depending on the location. That is why paintballs are kept below this threshold. So if you upped it by a factor of 10 that would mean it would anything with a velocity of 3000fps would pierce your skin.

So a good majority of rifle rounds would still penetrate the skin. And most pistol rounds would not. This is a good read on terminal ballistics

-some guy in Quora

so to answer your question no walkers won't be able to bite him unless they have a bite force comparable to a riffle.