Transcription activator involved in the activation of cuticular wax biosynthesis under drought stress. Binds directly to the promoters of genes involved in cuticular wax biosynthesis. Transactivates WSD1, KCS2/DAISY, CER1, CER2, FAR3 and ECR genes (PubMed:25305760, PubMed:27577115). Functions together with MYB96 in the activation of cuticular wax biosynthesis (PubMed:27577115). Expressed in germinating seeds, rosette and cauline leaves, flower buds, open flowers, stems and developing siliques. Induced by salt stress, osmotic shock and abscisic acid (ABA). Plants overexpressing MYB94 exhibit deposition of epicuticuar wax crystals on leaf surface.