Help in reducing laptop temperature

Hello,

I own a Clevo N550RC and recently I noticed that the laptop is quite hot when gaming.
It has an i7-6700HQ with Nvidia GTX 950m and the highest I ever saw the temperature was reaching 90°C on one of the sensors, and the cores were at 80°C+ with the GPU at 70°C+. Is this laptop temperature okay or should I do something about it. I use a Cooler Master X3 with it.
There are some ways in this article to improve the temperature of the notebook by replacing the thermal paste, do you know if it is useful?
https://pc4u.org/lower-laptop-temperature-improve-your-laptops-temperature-by-changing-the-thermal-paste/
Please advice.