Adults generally need at least seven hours of sleep a night. Sleep is not a pause in the day. It is when memory is sorted and the body does repair it will not do as well while you are upright and answering people. Cutting it to look busy is a loan. The interest shows up as attention, mood, and a weaker immune system.
Worth knowing
Seven hours is the floor for most adults, not a luxury for people with spare time.
About Sleep · U.S. Centers for Disease Control and Prevention · Year unknown