How does the placement of it's motor domain affect the directionality of a motor protein?
No. DNA, and RNA have a polarity in the orientation of their sugar-phosphate backbones, based on the numbering of the carbon atoms in the sugar rings. So, for example, we say that the sequence of this RNA is being read from the 5' to the 3' end, which indicates that the first nucleotide is exposing the hydroxyl at the 5’ carbon on its sugar ring.  At the other end of the linear polynucleotide the sugar is exposing the hydroxyl on its 3’ carbon of the sugar ring.

All mRNAs are translated in the 5’ to 3’ direction and all proteins are synthesized from the amino terminus to the carboxylate terminus, because the peptide bonds in the protein also have a directional polarity.

You appear to have mislabeled the N and C termini of Dynein in your diagram. Perhaps the  lecture was about the domain structure of these two motor proteins? And the point might have been that they each have three equivalent domains but in one case the part we call the head is synthesized first and in the other case the tail is synthesized first(?).