To make a tilted eyebrow as sketched requires a Complex Profile used in the BEAM tool and some SEO.
The BEAM tool is unique in Archicad because it tilts while maintaining its orthagonal shape.
1: Create your eyebrow in the Complex profile window.
2: apply it to a BEAM
3: Place the BEAM into the supporting roof
4: Apply the incline in the BEAM tool
5: For the SEO phase 1: use the BEAM as Operator and the ROOF as Target - subtract with extrude down
6: For the SEO phase 2: use the ROOF as Operator and the BEAM as Target - subtract with extrude down.
Dwight Atkinson