Most Arabic script characters follow a pattern where the nukta (dots above or below) are consistent in their positioning and design.
U+06BD ARABIC LETTER NOON WITH THREE DOTS ABOVE does not follow the normal pattern. In the Unicode name it says "WITH THREE DOTS ABOVE." However, only the isolate and final form have the dots above. In the initial and medial position the dots are below. Note that the dots point upward when the nukta are above the glyph, and they point downward when the nukta are below the glyph.
Isolate, Initial, Medial and Final Forms for U+06BD