Question about triple bypass surgery

So my mom is getting triple bypass surgery, I looked it up and this is the first thing I read ...

“Overall, more than 95% of people who have a coronary artery bypass graft will live for at least one year, and around 90% will live at least five years.”

Is this true? Will she only live for about 5 more years or one at that? Kinda freaking out but that just doesn’t seem right. Anyone ever had one or know any that’s had one? Is this true? She is only 42, lives a fairly healthy lifestyle she just works a lot and I know a lot of her stress comes from managing a restaurant..