From the scientific method, there would be discrepancy calling to question the authenticity of the shroud based on the height of the image only if 1) the actual height of Jesus was known, 2) a claim was made that the image on the cloth is his image, and 3) the height of image when compared with his known height could not be reconciled within acceptable scientific margins.
Has the Church said that the relic that is the Holy Shroud of Turin is the actual "clean linen cloth" in which Joseph of Arimathea wrapped the body of Jesus Christ? [cf. Mt 27:59 (RSVCE)].
According to The Holy Shroud (of Turin) | New Advent:
That the authenticity of the Shroud of Turin is taken for granted, in
various pronouncements of the Holy See cannot be disputed.
So to the Holy See [and many others], the relic is authentic, but the Holy See has not declared this relic was the burial shroud of the LORD.
It is said that this is the most studied artifact in history, therefore there are tons of material out there. Here is a link to one: