Please complete your profile so we know your OS and SketchUp version.
It looks like the "Solar North" tool's orange marker, which indicated where north is set in the model.
It's an Extension available from the EWH...
https://extensions.sketchup.com/en/content/solar-north
It has a Toolbar which allows you to set the angle, show/hide its marker etc...
The orange marker looks unusually 'high'.
If you switch on the Axes in View are they logically located ?
If you have changed them, then hover over one and choose 'Reset Axes from the context-menu.
It's normal to have the origin placed somewhere logical like at the model's lowest level, and on a corner...
Probably best to switch all Layers ON and View>Hidden-Geometry On, then select all and move the model to the axes' origin...