It's normal.
When there is a lot of free memory the OS freely gives memory to any process that requests it. The process may use that memory for few milliseconds only. But since there is not other demand for memory the process just hangs onto the memory, just in case it may need those instructions or data again. As a result it looks like the processes are using a lot of memory when most of the time, the memory is not being actively accessed
The thing to look at is the Memory Pressure graph at the bottom of the page. If that is green and not yellow or red, memory is sufficient to meet the needs of applications running. Notice yours is green and barely off the bottom of the scale.