The odds of living to be 90 years old is pretty good as long as you eat healthy, keep active and get plenty of exercise.
If you've made it to 65 or more then you have around a 50% chance of living to be 90 years old and if you've made it to 90 years old and are still very active and healthy you have at least a 20% to 30% chance of living to 100 or above.
The key to living to 90 and beyond is eating healthy, keeping your weight down and getting plenty of exercise and stay active.
You need to also keep your mind very active to increase your chances of living to a healthy 90 year old and beyond life.