How to use geomantic omen to solve the problem that there is no backer behind the office seat?

There is no support behind it, which may affect our rights or status, so we should use some methods to solve it. We can put a screen with a mountain pattern in the back to make an artificial backer. Replace the office chair with a thick, high-backed office chair to block some airflow, and put some heavier and thicker cushions on the chair.