Elevation Issues

I am having some trouble with elevation data gathered within the generated point cloud for a site I flew. All elevations across the site seem to be off by 1'-2' on average. I am comparing to a boots on the ground survey done by our survey team. I was wondering is there was a processing step I did wrong? O r perhaps an adjustment that can be made? I will include the Quality Report as an image. Thank you in advance for any help!