Impossible to say if we don't know what type of sensors they are. You say "proximity" but that could mean various things. @sonofcy thinks you mean PIR sensors. @xfpd thinks you mean ultrasonic sensors. Are either of them correct?
If PIR sensors are correct, the Arduino can't control them at all. There are often one or two small potentiometers on the PIR's PCB so that a human can control the sensitivity and on-period. But there's nothing the Arduino can control.
If ultrasonic sensors are correct, the Arduino can control when the sensors take a reading. It is possible for the Arduino to tell all sensors to take a reading simultaneously, but that would be pointless because the Arduino can't read the results from all 5 sensors simultaneously. Also it might cause incorrect readings because the sensors might detect each others audio signals.