the regular normality is 3N since theres 3mol of H+ ions in 1mol H3PO4. calcium forms a precipitate with phosphate in the form of Ca(H2PO4)2 (calcium dihydrogen phosphate). this allows phosphate to release only 1 of its H+ equivalents which will give you a normality of 1 and the following ions:
1/2M Ca(H2PO4)2 precipitate and 1M Cl ions
edit: one thing worth mentioning is that normality seems to be interchanged too much. it (to my understanding) is supposed to be used to describe the number of solute particles in solution but they usually use it in reference to the number of H+ equivalents. you can see how that becomes a problem if you view the example above. if you consider the solutes then you have the 1/2M Calcium dihydrogen phosphate and the 1M of Cl ions. which leaves you with an N=1.5, which is prob the wrong answer in the reference of this question.
